<template>
  
  <div>
    <input type="text" v-model="cityName">
    <h1>{{cityName}}</h1>

  </div>
</template>


<script>
export default {
    data(){
      return{
        cityName: 'shanghai123'
      }
    },
    watch:{
     
    }
}
</script>

<style scoped>

</style>